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pounds for the Purification 1 mo'nia, or its equivalent, being finally saturated with lime-water, where cient.

' first, because the minute Jenn s'ronnn cosnntnr, or new exerts, rnnnsxrvxnm.

measures-rm can PG'UNDS roe ran sosiraearlos or one.

, rence and State'of Pennsylvania, have invented a new anduseful Improvementin Oomof Gas; and I do hereby declarethe following to be a full, clear,

' and exact description-oi the invention.

Q My'invention relates to compounds for puri' fying coal and other gas; admixture of iron sponge,

and consists in an or iron sponge and iron borings' or turnings, with sawdust and slaked'lime or hydrate of lime, the iron hav-- ing first been oxidized bymeans of aqua-amand the admixture by a cheap and efficient purifier for the removal of sulphur and ammonia from gas is obtained. v

Heretoi'ore, in the purification of coal and .other gas, various substances have been cmployedsuoh as iron, lime, lead-salts, copper-- salts,'&c.-.-so net1mes separately and sometimes combined; but, so far as'l am aware, the various compounds have fallen into dis use, either because of. the difficulty and cost of ,manufactnring, or because they are more orless slow,-'i netiicient, andsoon become saturated, so as torequire removal from the puriher; .80 generally have thevarlous compounds failed n: usefulness that the old and longpra'cticed methods of purifying by means of hydrated lime (dryprocess) and lime-water (weflprocess) are most commonly followed.

The object of the present invention is to produce a purifying compound which shall be not only easily manufactured, but very elli- I will now proceed to describe my invention, so that others skilled in the art to which itappertai'ns may make anduse the same.

In carrying out my invention, or making my improved-purifyingcompound, I take iron sponge, such as -i'smade by the process described in the patent of Thus. S. Blair, hie. 125,924, dated May 21,1872, .ither alone or mixedlwith iron borings; but I give erence to the iron sponge for several reasonsmetallic iron renders it peculiarly sensitive to equivalent-tic at is,

the pref subdivision of the Specification forming part of Letter lPamnt No. 3-.9?:3, dat d August 26, 1879; application filed Tune 30, 1879. p

i an article ofi manufacture, it canbe obtained more readily and in larger quantities than iron borin'gs, which may be classed aswaste products incident to other manufactures and of irregular production.

Having the metallic iron specified in either as sponge or an admixture of sponge and borlngs, I sprinkle it with a small quantity of aqua-ammonia, oreqnivalent chemical, which will induce. oxidation of the metal, and allow the mass to rest for from six to twelve hours,l. stirring .it from time to time, if the same becomes necessary, nntil the metal is more or less thoroughly oxidized.

I next take the lime (or protoxide of calcium) and slalre the same to obtain the hydrate of lime, and from a portion of the hydrate of lime 1 form a strong lime-water in the wellknown-manner: t J

The oxidized iron. and hydrate of lime are then thoroughly mixed with sawdust or its an absorbent substance which will increase the'bnllr and porosity of the massin or ahoutthe following proportions, (varied more or less at will:) iron, (oxidized,) one (1) part; lime, (hydrated,) three (3) parts;

sawdust, eight (8) parts; and the massisthen saturated with-the strong lime-Water; v

' The above-described compound is readily manufactured, is very eificient in the removal ,o fsulphur and ammonia from gas, and does not become foul speedily or require to be soon removed from the purifier, as is the case with most of those at present in use.

Having thus described the nature and advantages of my invention, what I claim", and desire to secure by Letters Patent, is 4 vA gas-purifyin g compound containing the following substances in admixture: iron sponge alone or mixed with iron borings and oxidized, substantially as specified, hydrateef lime, and sawdust,in substantially the proportions speci- I lied, the whole saturated with lime-water, sub

stantially as and for the purpose specified.

In testimony whereof I, \thesaid JOHN Stronna Consumer, have hereunto set my hand. 1 9.

. JOHN STGBEB GONNELLY.

Witnesses:

F. W.B'rrrnn, Jan, A. l). JQHNE'EQN. 

